Features External drive bays: 1 x 5.25" & 1 x 3.5", Internal drive bays: 2 x 3.5" & 1 x 2.5"Dimensions 18.8" H x 15.7" W x 6" DSupport for 6th Generation Core i7Core i5Core i3PentiumCeleron ProcessorsSupport for 2 x DIMM, Max. 32GB, DDR4 2133 MHz Non-ECC, Un-buffered Memory.Option to upgrade to 4 x DIMM, 64GB DDR4 2133 MHZ Non-ECC MemoryIntegrated Graphics Processor- Intel HD Graphics supportMulti-VGA output support : 1- DVI-D & 1- VGA portOption to upgrade to Multi-monitor output support: HDMIDVI-D & VGA ports, 3 simultaneous monitor supportATX form factor with 300W PSU1 x PCIe 3.02.0 x16, 1 x PCIe 2.0 x1, 1 x PCI slotOption to upgrade to 1 x PCIe 3.0 x16, 1 x PCIe 3.0 x4, 2 x PCIe 3.0 x1 slot1 x Gigabit LAN ControllerRealtek ALC887 8-Channel High Definition Audio CODEC4 x USB 3.02.0 port(s)OS support: Windows 10 , 64bit, Windows 8.1 , 64bit & Windows 7 , 32bit64bit